Prevalence of interatrial block in a general hospital population

Asad, Navaid; Spodick, David H.

doi:10.1016/s0002-9149(02)03320-9

Cited by 72 publications

(57 citation statements)

References 8 publications

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“…The high prevalence of IAB (45.1%) in this retrospective investigation of nonacute admissions is comparable with that observed in two prior reports of 1,000 patients each (41.1 and 47%, respectively) [4, 5]. Although our study involved patients who had a clinical indication for an ECG, samples in both prior studies consisted of comparable tertiary care general hospital populations.…”

Section: Discussion and Limitationssupporting

confidence: 84%

“…Highly prevalent in the general hospital population [4, 5], IAB is a specific correlate of LA enlargement (LAE), with 88% of its patients shown to have this echocardiographic abnormality [6]. Not surprisingly, IAB is associated with LA electromechanical dysfunction (8.5% LA emptying fraction and 19.8 kdyn·s/cm LA kinetic energy compared with 24.6% and 64.7 kdyn·s/cm in controls matched for LA size; p < 0.0001), and thus, poses a risk for embolic strokes [7, 8].…”

Section: Introductionmentioning

confidence: 99%

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Potential Clinical Correlates and Risk Factors for Interatrial Block

et al. 2006

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Background: Interatrial block (IAB; P wave ≧110 ms) denotes a conduction delay between the atria, is strongly associated with atrial tachyarrhythmias, left atrial enlargement, left atrial electromechanical dysfunction, and is a risk for embolism. Despite this, potential risk factors for IAB have not been clearly defined. Methods: Patients admitted via the Emergency Department for nonacute medical reasons to the nontelemetry general medical floors of a tertiary care general hospital from October to November 2004 were screened for sinus rhythm on electrocardiograms. Four hundred and four patients who met our criteria were then evaluated for IAB on respective electrocardiograms. All patients were subsequently compared for common diseases as well as coronary artery disease (CAD) risk factors and divided into two groups, those with IAB and those without (control). Mean age ± standard deviation, odds ratios (ORs), 95% confidence intervals (CIs), r values, and p values were calculated. p values <0.05 were considered statistically significant. Results: From the sample (n = 404), 182 patients had IAB (45%; mean age 64.32 ± 19.27 years; males 51.6%) while 222 did not (control). CAD (OR 3.150, 95% CI 2.05–4.83; p < 0.001, r = 0.3), hypertension (OR 2.918, 95% CI 1.85–4.60; p < 0.001, r = 0.2), diabetes mellitus (OR 2.542, 95% CI 1.62–3.97; p < 0.001, r = 0.1), and hypercholesterolemia (OR 1.823, 95% CI 1.22–2.74; p = 0.004, r = 0.2) were significant risk factors and correlates for IAB. Multivariate analysis using stepwise linear regression revealed these factors as direct correlates of IAB. Conclusion: CAD, hypertension, diabetes mellitus and hypercholesterolemia appear to be risk factors for IAB in general hospital patients admitted for nonacute reasons. Considering the known sequelae of IAB, awareness of its associations with such risk factors could be important for patient risk stratification.

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Section: Discussion and Limitationssupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Potential Clinical Correlates and Risk Factors for Interatrial Block

et al. 2006

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“…IAB has been classified by Bayes de Luna [1] as partial or advanced (complete) and is denoted on the electrocardiogram (ECG) by bifid (notched) or biphasic (±) P waves, respectively, the latter in inferior leads. The importance of IAB cannot be overemphasized as it is highly prevalent, especially at ages 60 and over [2, 3], and potentially leads to atrial flutter and fibrillation as well as contributing to congestive heart failure [4,5,6,7]. We present a classic ECG of the much less common form of IAB, namely advanced IAB (fig.…”

Section: Introductionmentioning

confidence: 99%

Advanced Interatrial Block: A Classic Electrocardiogram

Ariyarajah

Spodick

2005

Cardiology

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Interatrial block (IAB; P wave ≧110 ms) indicates conduction delay between the right and left atria. IAB can present as partial or advanced and is denoted on the electrocardiogram (ECG) by bifid or biphasic P waves, respectively, the latter in inferior leads. The importance of IAB cannot be overemphasized due to high prevalence, especially at ages 60 and over, and due to grave associations with atrial flutter and fibrillation as well as congestive heart failure. Thus, we present a classic ECG of the much less common form of IAB, namely advanced IAB, as it serves as an excellent yardstick and teaching tool to help clinicians understand this medical entity thoroughly and to easily recognize this often missed type of block.

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“…A positive correlation between advancing age and P-wave duration was noted. 70,71 Slowed interatrial conduction velocity has been demonstrated in a cohort with a history of AF, underscoring the importance of atrial conduction delay. 72 Many studies reported intimate association of P-wave duration and occurrence of AF.…”

Section: Atrial Conduction Delay and Afmentioning

confidence: 99%